Question

Which of the following is the correct formula for specific fuel consumption?

(a) Qf=\(\frac{P}{C}\)

(b) Qf=\(\frac{C}{P}\)

(c) C=\(\frac{P}{Q_f}\)

(d) C=\(\frac{Q_f}{P}\)

I got this question in an interview.

I'd like to ask this question from Range and Endurance for Aircraft with Power Producing Engines topic in portion Cruising Performance of Aircraft Performance

Answer 1

The correct answer is (d) C=\(\frac{Q_f}{P}\)

The explanation is: The unit of specific fuel consumption is given by kg/kW-hr. The formula for specific fuel consumption is C=\(\frac{Q_f}{P}\) where Qf is fuel flow rate, P is power and C is specific fuel consumption.